28304448 has 28 divisors (see below), whose sum is σ = 74889360. Its totient is φ = 9434752.

The previous prime is 28304447. The next prime is 28304453. The reversal of 28304448 is 84440382.

It is a super-2 number, since 2×28304448² = 1602283553169408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28304447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73518 + ... + 73901.

It is an arithmetic number, because the mean of its divisors is an integer number (2674620).

Almost surely, 2^28304448 is an apocalyptic number.

It is an amenable number.

28304448 is an abundant number, since it is smaller than the sum of its proper divisors (46584912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28304448 is a wasteful number, since it uses less digits than its factorization.

28304448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147434 (or 147424 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 28304448 is about 5320.1924777211. The cubic root of 28304448 is about 304.7555077278.

The spelling of 28304448 in words is "twenty-eight million, three hundred four thousand, four hundred forty-eight".